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    <title>3D Input Manager — Alien.js</title>

    <link rel="preconnect" href="https://fonts.gstatic.com">
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto+Mono">
    <link rel="stylesheet" href="../assets/css/style.css">

    <script type="module">
        import { BloomCompositeMaterial, BoxGeometry, Color, ColorManagement, DirectionalLight, EnvironmentTextureLoader, Group, HemisphereLight, IcosahedronGeometry, LinearSRGBColorSpace, LuminosityMaterial, MapControls, MathUtils, Mesh, MeshStandardMaterial, OctahedronGeometry, OrthographicCamera, PanelItem, PerspectiveCamera, Raycaster, Scene, SceneCompositeDistortionMaterial, TextureLoader, UI, UnrealBloomBlurMaterial, Vector2, WebGLRenderTarget, WebGLRenderer, getFullscreenTriangle, ticker } from '../../build/alien.three.js';

        class AbstractCube extends Group {
            constructor() {
                super();

                this.position.x = 2.5;
            }

            async initMesh() {
                const geometry = new BoxGeometry();

                const material = new MeshStandardMaterial({
                    color: new Color().offsetHSL(0, 0, -0.65),
                    metalness: 0.7,
                    roughness: 0.7,
                    flatShading: true
                });

                const mesh = new Mesh(geometry, material);
                mesh.rotation.x = MathUtils.degToRad(-45);
                mesh.rotation.z = MathUtils.degToRad(-45);
                this.add(mesh);

                this.mesh = mesh;
            }

            // Event handlers

            onHover = ({ type }) => {
                console.log('AbstractCube', type);
                // if (type === 'over') {
                // } else {
                // }
            };

            onClick = () => {
                console.log('AbstractCube', 'click');
                // open('https://alien.js.org/');
            };

            // Public methods

            update = () => {
                this.mesh.rotation.y -= 0.005;
            };

            ready = () => this.initMesh();
        }

        class FloatingCrystal extends Group {
            constructor() {
                super();

                this.position.y = 0.7;
            }

            async initMesh() {
                const geometry = new OctahedronGeometry();

                const material = new MeshStandardMaterial({
                    color: new Color().offsetHSL(0, 0, -0.65),
                    metalness: 0.7,
                    roughness: 0.7,
                    flatShading: true
                });

                const mesh = new Mesh(geometry, material);
                mesh.scale.set(0.5, 1, 0.5);
                this.add(mesh);

                this.mesh = mesh;
            }

            // Event handlers

            onHover = ({ type }) => {
                console.log('FloatingCrystal', type);
                // if (type === 'over') {
                // } else {
                // }
            };

            onClick = () => {
                console.log('FloatingCrystal', 'click');
                // open('https://alien.js.org/');
            };

            // Public methods

            update = time => {
                this.mesh.position.y = Math.sin(time) * 0.1;
                this.mesh.rotation.y += 0.01;
            };

            ready = () => this.initMesh();
        }

        class DarkPlanet extends Group {
            constructor() {
                super();

                this.position.x = -2.5;

                // 25 degree tilt like Mars
                this.rotation.z = MathUtils.degToRad(25);
            }

            async initMesh() {
                const geometry = new IcosahedronGeometry(0.6, 12);

                const material = new MeshStandardMaterial({
                    color: new Color().offsetHSL(0, 0, -0.65),
                    metalness: 0.7,
                    roughness: 1
                });

                const mesh = new Mesh(geometry, material);
                this.add(mesh);

                this.mesh = mesh;
            }

            // Event handlers

            onHover = ({ type }) => {
                console.log('DarkPlanet', type);
                // if (type === 'over') {
                // } else {
                // }
            };

            onClick = () => {
                console.log('DarkPlanet', 'click');
                // open('https://alien.js.org/');
            };

            // Public methods

            update = () => {
                // Counter clockwise rotation
                this.mesh.rotation.y += 0.005;
            };

            ready = () => this.initMesh();
        }

        class SceneView extends Group {
            constructor() {
                super();

                this.visible = false;

                this.initViews();
            }

            initViews() {
                this.darkPlanet = new DarkPlanet();
                this.add(this.darkPlanet);

                this.floatingCrystal = new FloatingCrystal();
                this.add(this.floatingCrystal);

                this.abstractCube = new AbstractCube();
                this.add(this.abstractCube);
            }

            addListeners() {
                InputManager.add(this.darkPlanet, this.floatingCrystal, this.abstractCube);
            }

            removeListeners() {
                InputManager.remove(this.darkPlanet, this.floatingCrystal, this.abstractCube);
            }

            // Public methods

            update = time => {
                this.darkPlanet.update(time);
                this.floatingCrystal.update(time);
                this.abstractCube.update(time);
            };

            animateIn = () => {
                this.addListeners();
            };

            ready = () => Promise.all([
                this.darkPlanet.ready(),
                this.floatingCrystal.ready(),
                this.abstractCube.ready()
            ]);
        }

        class SceneController {
            static init(view) {
                this.view = view;
            }

            // Public methods

            static update = time => {
                if (!this.view.visible) {
                    return;
                }

                this.view.update(time);
            };

            static animateIn = () => {
                this.view.animateIn();

                this.view.visible = true;
            };

            static ready = () => this.view.ready();
        }

        class PanelController {
            static init(ui) {
                this.ui = ui;

                this.initPanel();
            }

            static initPanel() {
                const { luminosityMaterial, bloomCompositeMaterial, compositeMaterial } = RenderManager;

                const items = [
                    {
                        name: 'FPS'
                    },
                    {
                        type: 'divider'
                    },
                    {
                        type: 'slider',
                        name: 'Thresh',
                        min: 0,
                        max: 1,
                        step: 0.01,
                        value: luminosityMaterial.uniforms.uThreshold.value,
                        callback: value => {
                            luminosityMaterial.uniforms.uThreshold.value = value;
                        }
                    },
                    {
                        type: 'slider',
                        name: 'Smooth',
                        min: 0,
                        max: 1,
                        step: 0.01,
                        value: luminosityMaterial.uniforms.uSmoothing.value,
                        callback: value => {
                            luminosityMaterial.uniforms.uSmoothing.value = value;
                        }
                    },
                    {
                        type: 'slider',
                        name: 'Strength',
                        min: 0,
                        max: 2,
                        step: 0.01,
                        value: RenderManager.bloomStrength,
                        callback: value => {
                            RenderManager.bloomStrength = value;
                            bloomCompositeMaterial.uniforms.uBloomFactors.value = RenderManager.bloomFactors();
                        }
                    },
                    {
                        type: 'slider',
                        name: 'Radius',
                        min: 0,
                        max: 1,
                        step: 0.01,
                        value: RenderManager.bloomRadius,
                        callback: value => {
                            RenderManager.bloomRadius = value;
                            bloomCompositeMaterial.uniforms.uBloomFactors.value = RenderManager.bloomFactors();
                        }
                    },
                    {
                        type: 'slider',
                        name: 'Chroma',
                        min: 0,
                        max: 10,
                        step: 0.1,
                        value: compositeMaterial.uniforms.uBloomDistortion.value,
                        callback: value => {
                            compositeMaterial.uniforms.uBloomDistortion.value = value;
                        }
                    }
                ];

                items.forEach(data => {
                    this.ui.addPanel(new PanelItem(data));
                });
            }
        }

        const BlurDirectionX = new Vector2(1, 0);
        const BlurDirectionY = new Vector2(0, 1);

        class RenderManager {
            static init(renderer, scene, camera) {
                this.renderer = renderer;
                this.scene = scene;
                this.camera = camera;

                // Unreal bloom
                this.luminosityThreshold = 0.1;
                this.luminositySmoothing = 1;
                this.bloomStrength = 0.3;
                this.bloomRadius = 0.2;
                this.bloomDistortion = 1;

                this.enabled = true;

                this.initRenderer();
            }

            static initRenderer() {
                const { screenTriangle } = WorldController;

                // Fullscreen triangle
                this.screenCamera = new OrthographicCamera(-1, 1, 1, -1, 0, 1);
                this.screen = new Mesh(screenTriangle);
                this.screen.frustumCulled = false;

                // Render targets
                this.renderTarget = new WebGLRenderTarget(1, 1, {
                    depthBuffer: false
                });

                this.renderTargetBright = this.renderTarget.clone();
                this.renderTargetsHorizontal = [];
                this.renderTargetsVertical = [];
                this.nMips = 5;

                for (let i = 0, l = this.nMips; i < l; i++) {
                    this.renderTargetsHorizontal.push(this.renderTarget.clone());
                    this.renderTargetsVertical.push(this.renderTarget.clone());
                }

                this.renderTarget.depthBuffer = true;

                // Luminosity high pass material
                this.luminosityMaterial = new LuminosityMaterial();
                this.luminosityMaterial.uniforms.uThreshold.value = this.luminosityThreshold;
                this.luminosityMaterial.uniforms.uSmoothing.value = this.luminositySmoothing;

                // Separable Gaussian blur materials
                this.blurMaterials = [];

                const kernelSizeArray = [3, 5, 7, 9, 11];

                for (let i = 0, l = this.nMips; i < l; i++) {
                    this.blurMaterials.push(new UnrealBloomBlurMaterial(kernelSizeArray[i]));
                }

                // Unreal bloom composite material
                this.bloomCompositeMaterial = new BloomCompositeMaterial();
                this.bloomCompositeMaterial.uniforms.tBlur1.value = this.renderTargetsVertical[0].texture;
                this.bloomCompositeMaterial.uniforms.tBlur2.value = this.renderTargetsVertical[1].texture;
                this.bloomCompositeMaterial.uniforms.tBlur3.value = this.renderTargetsVertical[2].texture;
                this.bloomCompositeMaterial.uniforms.tBlur4.value = this.renderTargetsVertical[3].texture;
                this.bloomCompositeMaterial.uniforms.tBlur5.value = this.renderTargetsVertical[4].texture;
                this.bloomCompositeMaterial.uniforms.uBloomFactors.value = this.bloomFactors();

                // Composite material
                this.compositeMaterial = new SceneCompositeDistortionMaterial({ dithering: true });
                this.compositeMaterial.uniforms.uBloomDistortion.value = this.bloomDistortion;
            }

            static bloomFactors() {
                const bloomFactors = [1, 0.8, 0.6, 0.4, 0.2];

                for (let i = 0, l = this.nMips; i < l; i++) {
                    const factor = bloomFactors[i];
                    bloomFactors[i] = this.bloomStrength * MathUtils.lerp(factor, 1.2 - factor, this.bloomRadius);
                }

                return bloomFactors;
            }

            // Public methods

            static resize = (width, height, dpr) => {
                this.renderer.setPixelRatio(dpr);
                this.renderer.setSize(width, height);

                width = Math.round(width * dpr);
                height = Math.round(height * dpr);

                this.renderTarget.setSize(width, height);

                // Unreal bloom
                width = Math.round(width / 2);
                height = Math.round(height / 2);

                this.renderTargetBright.setSize(width, height);

                for (let i = 0, l = this.nMips; i < l; i++) {
                    this.renderTargetsHorizontal[i].setSize(width, height);
                    this.renderTargetsVertical[i].setSize(width, height);

                    this.blurMaterials[i].uniforms.uResolution.value.set(width, height);

                    width = Math.round(width / 2);
                    height = Math.round(height / 2);
                }
            };

            static update = () => {
                const renderer = this.renderer;
                const scene = this.scene;
                const camera = this.camera;

                if (!this.enabled) {
                    renderer.setRenderTarget(null);
                    renderer.render(scene, camera);
                    return;
                }

                const renderTarget = this.renderTarget;
                const renderTargetBright = this.renderTargetBright;
                const renderTargetsHorizontal = this.renderTargetsHorizontal;
                const renderTargetsVertical = this.renderTargetsVertical;

                // Scene pass
                renderer.setRenderTarget(renderTarget);
                renderer.render(scene, camera);

                // Extract bright areas
                this.luminosityMaterial.uniforms.tMap.value = renderTarget.texture;
                this.screen.material = this.luminosityMaterial;
                renderer.setRenderTarget(renderTargetBright);
                renderer.render(this.screen, this.screenCamera);

                // Blur all the mips progressively
                let inputRenderTarget = renderTargetBright;

                for (let i = 0, l = this.nMips; i < l; i++) {
                    this.screen.material = this.blurMaterials[i];

                    this.blurMaterials[i].uniforms.tMap.value = inputRenderTarget.texture;
                    this.blurMaterials[i].uniforms.uDirection.value = BlurDirectionX;
                    renderer.setRenderTarget(renderTargetsHorizontal[i]);
                    renderer.render(this.screen, this.screenCamera);

                    this.blurMaterials[i].uniforms.tMap.value = this.renderTargetsHorizontal[i].texture;
                    this.blurMaterials[i].uniforms.uDirection.value = BlurDirectionY;
                    renderer.setRenderTarget(renderTargetsVertical[i]);
                    renderer.render(this.screen, this.screenCamera);

                    inputRenderTarget = renderTargetsVertical[i];
                }

                // Composite all the mips
                this.screen.material = this.bloomCompositeMaterial;
                renderer.setRenderTarget(renderTargetsHorizontal[0]);
                renderer.render(this.screen, this.screenCamera);

                // Composite pass (render to screen)
                this.compositeMaterial.uniforms.tScene.value = renderTarget.texture;
                this.compositeMaterial.uniforms.tBloom.value = renderTargetsHorizontal[0].texture;
                this.screen.material = this.compositeMaterial;
                renderer.setRenderTarget(null);
                renderer.render(this.screen, this.screenCamera);
            };
        }

        class InputManager {
            static init(camera) {
                this.camera = camera;

                this.raycaster = new Raycaster();

                this.objects = [];
                this.mouse = new Vector2(-1, -1);
                this.delta = new Vector2();
                this.coords = new Vector2(-2, 2);
                this.hover = null;
                this.click = null;
                this.lastTime = 0;
                this.lastMouse = new Vector2();
                this.raycastInterval = 1 / 10; // 10 frames per second
                this.lastRaycast = 0;
                this.enabled = true;

                this.addListeners();
            }

            static addListeners() {
                window.addEventListener('pointerdown', this.onPointerDown);
                window.addEventListener('pointermove', this.onPointerMove);
                window.addEventListener('pointerup', this.onPointerUp);
            }

            static removeListeners() {
                window.removeEventListener('pointerdown', this.onPointerDown);
                window.removeEventListener('pointermove', this.onPointerMove);
                window.removeEventListener('pointerup', this.onPointerUp);
            }

            // Event handlers

            static onPointerDown = e => {
                if (!this.enabled) {
                    return;
                }

                this.lastTime = performance.now();
                this.lastMouse.set(e.clientX, e.clientY);

                this.onPointerMove(e);

                if (this.hover) {
                    this.click = this.hover;
                }
            };

            static onPointerMove = e => {
                if (!this.enabled) {
                    return;
                }

                if (e) {
                    this.mouse.x = e.clientX;
                    this.mouse.y = e.clientY;
                    this.coords.x = (this.mouse.x / document.documentElement.clientWidth) * 2 - 1;
                    this.coords.y = 1 - (this.mouse.y / document.documentElement.clientHeight) * 2;
                }

                this.raycaster.setFromCamera(this.coords, this.camera);

                const intersection = this.raycaster.intersectObjects(this.objects);

                if (intersection.length) {
                    let object = intersection[0].object;

                    if (object.parent.isGroup) {
                        object = object.parent;
                    }

                    if (!this.hover) {
                        this.hover = object;
                        this.hover.onHover({ type: 'over' });
                        document.body.style.cursor = 'pointer';
                    } else if (this.hover !== object) {
                        this.hover.onHover({ type: 'out' });
                        this.hover = object;
                        this.hover.onHover({ type: 'over' });
                        document.body.style.cursor = 'pointer';
                    }
                } else if (this.hover) {
                    this.hover.onHover({ type: 'out' });
                    this.hover = null;
                    document.body.style.cursor = '';
                }

                this.delta.subVectors(this.mouse, this.lastMouse);
            };

            static onPointerUp = () => {
                if (!this.enabled) {
                    return;
                }

                if (performance.now() - this.lastTime > 250 || this.delta.length() > 50) {
                    this.click = null;
                    return;
                }

                if (this.click && this.click === this.hover) {
                    this.click.onClick();
                }

                this.click = null;
            };

            // Public methods

            static update = time => {
                if (!navigator.maxTouchPoints && time - this.lastRaycast > this.raycastInterval) {
                    this.onPointerMove();
                    this.lastRaycast = time;
                }
            };

            static add = (...objects) => {
                this.objects.push(...objects);
            };

            static remove = (...objects) => {
                objects.forEach(object => {
                    const index = this.objects.indexOf(object);

                    if (~index) {
                        this.objects.splice(index, 1);
                    }

                    if (object.parent.isGroup) {
                        object = object.parent;
                    }

                    if (object === this.hover) {
                        this.hover.onHover({ type: 'out' });
                        this.hover = null;
                        document.body.style.cursor = '';
                    }
                });
            };
        }

        class WorldController {
            static init() {
                this.initWorld();
                this.initLights();
                this.initLoaders();
                this.initEnvironment();
                this.initControls();

                this.addListeners();
            }

            static initWorld() {
                this.renderer = new WebGLRenderer({
                    powerPreference: 'high-performance',
                    antialias: true
                });

                // Output canvas
                this.element = this.renderer.domElement;

                // Disable color management
                ColorManagement.enabled = false;
                this.renderer.outputColorSpace = LinearSRGBColorSpace;

                // 3D scene
                this.scene = new Scene();
                this.scene.background = new Color(0x060606);
                this.camera = new PerspectiveCamera(30);
                this.camera.near = 0.5;
                this.camera.far = 40;
                this.camera.position.set(0, 6, 8);
                this.camera.lookAt(this.scene.position);

                // Global geometries
                this.screenTriangle = getFullscreenTriangle();

                // Global uniforms
                this.resolution = { value: new Vector2() };
                this.texelSize = { value: new Vector2() };
                this.aspect = { value: 1 };
                this.time = { value: 0 };
                this.frame = { value: 0 };

                // Global settings
                this.anisotropy = this.renderer.capabilities.getMaxAnisotropy();
            }

            static initLights() {
                this.scene.add(new HemisphereLight(0x606060, 0x404040, 3));

                const light = new DirectionalLight(0xffffff, 2);
                light.position.set(5, 5, 5);
                this.scene.add(light);
            }

            static initLoaders() {
                this.textureLoader = new TextureLoader();
                this.textureLoader.setPath('../assets/textures/');

                this.environmentLoader = new EnvironmentTextureLoader(this.renderer);
                this.environmentLoader.setPath('../assets/textures/env/');
            }

            static async initEnvironment() {
                this.scene.environment = await this.loadEnvironmentTexture('jewelry_black_contrast.jpg');
                this.scene.environmentIntensity = 1.2;
            }

            static initControls() {
                this.controls = new MapControls(this.camera, this.renderer.domElement);
                this.controls.enableDamping = true;
            }

            static addListeners() {
                this.renderer.domElement.addEventListener('touchstart', this.onTouchStart);
            }

            // Event handlers

            static onTouchStart = e => {
                e.preventDefault();
            };

            // Public methods

            static resize = (width, height, dpr) => {
                this.camera.aspect = width / height;
                this.camera.updateProjectionMatrix();

                width = Math.round(width * dpr);
                height = Math.round(height * dpr);

                this.resolution.value.set(width, height);
                this.texelSize.value.set(1 / width, 1 / height);
                this.aspect.value = width / height;
            };

            static update = (time, delta, frame) => {
                this.time.value = time;
                this.frame.value = frame;

                this.controls.update();
            };

            static ready = () => Promise.all([
                this.textureLoader.ready(),
                this.environmentLoader.ready()
            ]);

            // Global handlers

            static getTexture = (path, callback) => this.textureLoader.load(path, callback);

            static loadTexture = path => this.textureLoader.loadAsync(path);

            static loadEnvironmentTexture = path => this.environmentLoader.loadAsync(path);
        }

        class App {
            static async init() {
                this.initWorld();
                this.initViews();
                this.initControllers();

                this.addListeners();
                this.onResize();

                await SceneController.ready();
                await WorldController.ready();

                this.initPanel();

                SceneController.animateIn();
            }

            static initWorld() {
                WorldController.init();
                document.body.appendChild(WorldController.element);
            }

            static initViews() {
                this.view = new SceneView();
                WorldController.scene.add(this.view);

                this.ui = new UI({ fps: true });
                this.ui.animateIn();
                document.body.appendChild(this.ui.element);
            }

            static initControllers() {
                const { renderer, scene, camera } = WorldController;

                SceneController.init(this.view);
                InputManager.init(camera);
                RenderManager.init(renderer, scene, camera);
            }

            static initPanel() {
                PanelController.init(this.ui);
            }

            static addListeners() {
                window.addEventListener('resize', this.onResize);
                ticker.add(this.onUpdate);
                ticker.start();
            }

            // Event handlers

            static onResize = () => {
                const width = document.documentElement.clientWidth;
                const height = document.documentElement.clientHeight;
                const dpr = window.devicePixelRatio;

                WorldController.resize(width, height, dpr);
                RenderManager.resize(width, height, dpr);
            };

            static onUpdate = (time, delta, frame) => {
                WorldController.update(time, delta, frame);
                SceneController.update(time);
                InputManager.update(time);
                RenderManager.update(time, delta, frame);
                this.ui.update();
            };
        }

        App.init();
    </script>
</head>
<body>
</body>
</html>
